/* Sound Toggle */
.sound-toggle {
    position: absolute;
    bottom: 30px;
    right: 30px;
    z-index: 10;
    background: rgba(0, 0, 0, 0.6);
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s;
}

.sound-toggle:hover {
    background: rgba(0, 0, 0, 0.8);
}